Identify the segment in the sentence which contains a grammatical error. If there is no error, then select the option 'No error'.

I am hearing a strange noise now.

1. noise now

2. a strange

3. I am hearing

4. No error

Select the most appropriate meaning of the highlighted idiom in the following sentence.

I just went to Bali on a backpacking trip and did everything (by the ear) without any itinerary.

1. by spreading rumors

2. by improvisation

3. while criticising

4. by asking

Select the option that can be used as a one-word substitute for the given group of words.

A formal statement testifying to someone's character and qualifications.

1. Document

2. Affidavit

3. Testimonial

4. Manuscript

Select the most appropriate word which means the same as the group of words given.

Confirm or support something.

1. Collaborate

2. Corroborate

3. Cooperate

4. Consider

Select the most appropriate meaning of the given idiom.

Months on end

1. In a month's time

2. End of the month

3. Last month of the year

4. Several months in a row